I have the 5508.05 port, which also fits the 105 Macro but also has a a manual focus knob. This gives you the option to use manual or autofocus. Accorcding to the Ikelite website port chart ( http://ikelite.com/w...port_nikon.html ) the 5508.5 accomodates the same size lens as the 5505.5. The port is in new condition because I upgraded to the modular shortly after I bought this port. I will sell it to you for $100 including flat rate shipping. I am located in Sarasota Florida.